<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图区-->
    <el-card class="box-card">
      <!--element Layout 栅格布局 搜索栏-->
      <el-row :gutter="20">
        <el-col :span="4">
          <!-- 搜索框-->
          <el-input placeholder="请输入内容" v-model="queryParams.query" clearable @clear="getUserList">
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>

      <!--用户数据表格区-->
      <el-table :data="userList" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column prop="username" label="姓名"></el-table-column>
        <el-table-column prop="email" label="邮箱"></el-table-column>
        <el-table-column prop="mobile" label="电话"></el-table-column>
        <el-table-column prop="role_name" label="角色"></el-table-column>
        <el-table-column label="状态">
          <!--作用域插槽：可以拿到这一行的json数据-->
<!--          <template slot-scope="scope">-->
<!--            {{ scope.row }}-->
<!--          </template>-->
          <template slot-scope="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStatusChanged(scope.row)"></el-switch>
          </template>
        </el-table-column>

        <el-table-column prop="" label="操作" width="200px">
          <template slot-scope="scope">
            <el-tooltip effect="dark" content="编辑" placement="top" :enterable="false">
              <!--修改按钮-->
              <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
            </el-tooltip>

            <el-tooltip effect="dark" content="删除" placement="top" :enterable="false">
              <!--删除按钮-->
              <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
            </el-tooltip>

            <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
              <!--分配角色按钮-->
              <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>

      <!--分页区域-->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryParams.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryParams.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>

      <!--添加用户的对话框-->
      <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
        <!--内容主体区域-->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
          <el-form-item label="用户名" prop="username">
            <el-input v-model="addForm.username"></el-input>
          </el-form-item>
          <el-form-item label="密码" prop="password">
            <el-input v-model="addForm.password"></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="addForm.email"></el-input>
          </el-form-item>
          <el-form-item label="手机" prop="mobile">
            <el-input v-model="addForm.mobile"></el-input>
          </el-form-item>
        </el-form>
        <!--底部按钮区域-->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addUser">确 定</el-button>
        </span>
      </el-dialog>

      <!--修改用户的对话框-->
      <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">

        <!--内容主体区域-->
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
          <el-form-item label="用户名">
            <el-input v-model="editForm.username" disabled></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="editForm.email"></el-input>
          </el-form-item>
          <el-form-item label="手机号" prop="mobile">
            <el-input v-model="editForm.mobile" ></el-input>
          </el-form-item>
        </el-form>

        <!--底部按钮区域-->
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editUserInfo">确 定</el-button>
        </span>
      </el-dialog>

      <!--分配角色的对话框-->
      <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" @close="setRoleDialogClosed">
        <!--内容主体区域-->
        <div>
          <p>当前的用户：{{ userInfo.username }}</p>
          <p>当前的角色：{{ userInfo.role_name }}</p>
          <p>分配新角色：
            <el-select v-model="selectedRoleId" placeholder="请选择">
              <el-option v-for="item in rolesList" :key="item.id" :label="item.roleName" :value="item.id"></el-option>
            </el-select>
          </p>
        </div>
        <!--底部按钮区域-->
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
        </span>
      </el-dialog>

    </el-card>
  </div>
</template>

<script>
export default {
  name: 'User',
  data () {
    // 自定义校验规则 邮箱
    var checkEmail = (rule, value, callback) => {
      // 验证邮箱的正则表达式
      const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
      if (regEmail.test(value)) {
        // 成功
        return callback()
      }
      // 失败
      callback(new Error('请输入合法的邮箱'))
    }
    // 自定义校验规则 手机号
    var checkMobile = (rule, value, callback) => {
      // 验证手机号的正则表达式
      const regMobile = /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/
      if (regMobile.test(value)) {
        // 成功
        return callback()
      }
      // 失败
      callback(new Error('请输入合法的手机号'))
    }
    return {
      // 获取用户信息的http请求的参数
      queryParams: {
        query: '',
        // 当前页码
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 2
      },
      userList: [],
      total: 0,
      // 控制添加用户对话框的显示和隐藏
      addDialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 添加用户的表单数据验证规则对象
      addFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '用户名长度在 3 到 20 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '密码长度在 6 到 20 个字符', trigger: 'blur' }
        ],
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 编辑用户对话框显示与隐藏
      editDialogVisible: false,
      // 保存要编辑用户的信息
      editForm: {},
      editFormRules: {
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 显示和隐藏分配角色的对话框
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo: {},
      // 角色列表
      rolesList: [],
      // 选中的角色id值
      selectedRoleId: ''
    }
  },
  methods: {
    async getUserList () {
      const { data: res } = await this.$http.get('users', { params: this.queryParams })
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.userList = res.data.users
      this.total = res.data.total
    },
    // 监听 pageSize 改变的
    handleSizeChange (pageSize) {
      // console.log(pageSize)
      this.queryParams.pagesize = pageSize
      this.getUserList()
    },
    // 监听 页码值 变化的数据
    handleCurrentChange (newPageNum) {
      // console.log(newPageNum)
      this.queryParams.pagenum = newPageNum
      this.getUserList()
    },
    // 监听swith开关状态改变
    async userStatusChanged (userInfo) {
      // console.log(userInfo)
      const { data: res } = await this.$http.put(`users/${userInfo.id}/state/${userInfo.mg_state}`)
      if (res.meta.status !== 200) {
        // 如果操作失败，则页面状态和原来保持一致
        userInfo.mg_state = !userInfo.mg_state
        return this.$message.error(res.meta.msg)
      }
      this.$message.success('更新成功')
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 添加用户按钮点击的预校验
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        // 发起请求
        const { data: res } = await this.$http.post('users', this.addForm)
        if (res.meta.status !== 201) this.$message.error(res.meta.msg)
        this.$message.success(res.meta.msg)
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getUserList()
      })
    },
    // 显示编辑用户的对话框
    async showEditDialog (id) {
      // console.log(id)
      const { data: res } = await this.$http.get('users/' + id)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.editForm = res.data

      // 编辑框的显示开关
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的监听事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 验证并修改用户信息
    editUserInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // console.log(valid)
        const { data: res } = await this.$http.put('users/' + this.editForm.id, {
          email: this.editForm.email,
          mobile: this.editForm.mobile
        })
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }

        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getUserList()
        // 提示修改成功
        this.$message.success('更新用户信息成功')
      })
    },
    // 根据id删除用户信息
    async removeUserById (id) {
      // 弹框询问  this.$confirm的返回值是Promise,可以使用aync和await优化
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => {
        // catch中只有一行代码，所以可以简写成   }).catch(err => err})
        return err
      })

      // 如果用户点击'确定'，则返回值confirmResult='confirm'
      // 如果用户点击'取消'，则返回值confirmResult='cancel'
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // console.log('确认了删除')
      const { data: res } = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }

      // 刷新数据列表
      this.getUserList()
      // 提示删除成功
      this.$message.success('删除用户信息成功')
    },
    // 展示分配角色对话框
    async setRole (userInfo) {
      this.userInfo = userInfo

      // 获取所有的角色列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },
    // 点击按钮 分配角色
    async saveRoleInfo () {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择要分配的角色')
      }
      // 保存角色
      const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, { rid: this.selectedRoleId })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success('更新角色成功！')
      this.getUserList()
      this.setRoleDialogVisible = false
    },
    // 监听分配角色对话框关闭事件
    setRoleDialogClosed () {
      this.selectedRoleId = ''
      this.userInfo = {}
    }
  },
  created () {
    this.getUserList()
  }
}
</script>

<style lang="less" scoped>

</style>
